/*******************************************************************************
 * Copyright 2017 Bstek
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License.  You may obtain a copy
 * of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
 * License for the specific language governing permissions and limitations under
 * the License.
 ******************************************************************************/
package com.bstek.urule.runtime.assertor;

import com.bstek.urule.Utils;
import com.bstek.urule.model.library.Datatype;
import com.bstek.urule.model.rule.Op;

import java.math.BigDecimal;
import java.util.Calendar;
import java.util.Date;

/**
 * @author Jacky.gao
 * @since 2015年1月6日
 */
public class EqualsIgnoreCaseAssertor implements Assertor {
    @SuppressWarnings("unchecked")
    public boolean eval(Object left, Object right, Datatype datatype) {
        if (left == null && right == null) {
            return true;
        } else if (left == null || right == null) {
            return false;
        }
        BigDecimal b1 = null;
        BigDecimal b2 = null;
        switch (datatype) {
            case String:
                return left.toString().equalsIgnoreCase(right.toString());
            case Boolean:
                return left.toString().equals(right.toString());
            case Date:
                Date ld = (Date) datatype.convert(left);
                Date rd = (Date) datatype.convert(right);
                Calendar leftCalendar = Calendar.getInstance();
                leftCalendar.setTime(ld);
                Calendar rightCalendar = Calendar.getInstance();
                rightCalendar.setTime(rd);
                return leftCalendar.compareTo(rightCalendar) == 0;
            case Double:
                b1 = Utils.toBigDecimal(left);
                b2 = Utils.toBigDecimal(right);
                return b1.compareTo(b2) == 0;
            case Float:
                b1 = Utils.toBigDecimal(left);
                b2 = Utils.toBigDecimal(right);
                return b1.compareTo(b2) == 0;
            case Integer:
                b1 = Utils.toBigDecimal(left);
                b2 = Utils.toBigDecimal(right);
                return b1.compareTo(b2) == 0;
            case Long:
                b1 = Utils.toBigDecimal(left);
                b2 = Utils.toBigDecimal(right);
                return b1.compareTo(b2) == 0;
            case BigDecimal:
                b1 = Utils.toBigDecimal(left);
                b2 = Utils.toBigDecimal(right);
                return b1.compareTo(b2) == 0;
            case Enum:
                Enum<?> e1 = (Enum<?>) left;
                if (right instanceof Enum) {
                    Enum<?> e2 = (Enum<?>) right;
                    return e1.equals(e2);
                } else {
                    Enum<?> e2 = Enum.valueOf(e1.getClass(), right.toString());
                    return e1.equals(e2);
                }
            default:
                return right.toString().equalsIgnoreCase(left.toString());
        }
    }

    public boolean support(Op op) {
        return op.equals(Op.EqualsIgnoreCase);
    }
}
